Python developer
PHP developer

Maciej Katarzynski

I'm a senior PHP developer who recently switched to Python.
Happy to join new ventures like startups and challenging projects.

Get in touch

What I Do

Software development

Web and software development from A to Z. I have a proven track record of successfully delivering robust and scalable solutions. I am proficient in utilizing frameworks such as Flask and Laravel to build both backend and web applications, leveraging their powerful features to create dynamic and user-friendly interfaces. My strong problem-solving skills and ability to adapt to new technologies make me a valuable asset in any software development team.

Server management

With a solid background in server management, I bring valuable expertise to ensure efficient and reliable operations of complex IT infrastructures. I possess extensive experience in configuring, deploying, and maintaining servers based on Linux environments. Proficient in virtualization technologies such as VirtualBox and Docker, I have successfully implemented virtualized environments that optimize resource allocation and enhance scalability.

Cryptocurrency Consulting

I offer comprehensive expertise and guidance in the dynamic and rapidly evolving world of digital currencies. With a deep understanding of blockchain technology and its applications, I assist clients in understanding the fundamentals of various cryptocurrencies, such as Bitcoin and Ethereum, as well as their potential benefits and risks. Leveraging my knowledge of cryptocurrency exchanges, wallets, and security protocols.

Visual content creation

As a passionate filmmaker and photographer, I possess a keen eye for capturing compelling visual narratives and creating engaging video and photo content. Whether it's shooting and editing videos or capturing stunning still images, I bring creativity, attention to detail, and a strong understanding of visual aesthetics to every project. I am adept at collaborating with clients to understand their vision and objectives.

Experience

2023/12 → 2024/04

Company: Consumer Edge

Equity research and data insights platform for investors. I was responsible for creating API endpoints that deliver accurate data to the front end.

2022/10 → 2023/04

Company: Tend AG, Project: Internal service

Tend AG, a Swiss company, offers intelligent solutions for the real estate industry. The project in which I participated was a dashboard designed for real estate investors, providing them with comprehensive information and predictions regarding their properties.

2019/11 → 2022/09

Company: Satsback Labs Inc., Project: Satsback.com

Polish-based startup, where you can receive cashback in Bitcoin for online shopping. I was the lead developer, building the first version of this application from scratch + maintaining it over the years.

2018/11 → 2019/06

Company: Wave Advertising Limited, Project: WaveTrackR

I've been part of a development team working on WaveTrackr which is a recruitment platform to multi-job post jobs across different services. My tasks was also to integrate with ATS systems like Bullhorn.

2018/05

Dianet

Working on a test project which is based on XIN (Infinity Economics) blockchain. The project is used to manage recurring subscriptions using cryptocurrency.

2018/01 → 2018/04

Company: Bitbe, Project: Tesigo.io

Tesigo is a trading platform similar to etoro.com, which helps newbie traders start off with the cryptocurrency market. It also pays a revenue share to experienced traders for their correct insights.

2016/11 → 2017/04

Company: Unister Gmbh, Project: Preisvergleich.de

Preisvergleich.de is a German price comparison website. It was helping users to find not only products, but also utilities like energy, gas or phone.

2015/11 → 2016/09

Company: CaseHub Ltd., Project: Casehub.com

CaseHub is a platform described as `Kickstarter for lawsuits and class actions. The company gathers a community of people who want to sue corporations.

2015/06 → 2015/11

Company: Ovufriend sp z o. o. Project: Ovufriend.pl & BellyBestfriend.pl

These projects are targeted at women who want to get pregnant (Ovufriend) or who are already pregnant (BellyBestFriend). The system helps and leads women through the process. Thanks to calculations and calendars it helps to control pregnancy or to determine the best day to try to get pregnant. Both websites also got Social Network features, such as forum and public diaries.

2012/12 → 2013/04

IT4Business

A Polish web development company. Working on various projects, starting from simple websites to product management software

2012/10 → 2012/12

Empathy Internet Software House (now Unity Group)

A Polish software house focused on creating e-commerce websites for major Polish brands like TopSecret, Nomi, Es-System.

2012/02 → 2012/07

Dotpay, Project: Dotpay

Dotpay.pl is one of the leading Polish payment systems. It integrates with different types of websites, allowing its users to pay by wire transfer or by text message.

Side Projects

2023/04 → now

Project: Stock & Crypto trading BOT

2016/09

Project: Exitbar.io (sold)

Exitbar is a SaaS tool designed for online advertising. It allows marketers to put their ads and CTA buttons on any website and/or article on the internet. The first alpha version (available at exitbar.io) was released one year ago. As it became popular, a new and more advanced version is currently under construction.

2016/09

Project: CoinsMarket.io (sold)

CoinsMarket was a simple cryptocurrency exchanger, which allowed users to buy one out of 117 cryptocurrencies using FIAT currency. It was sold in June 2018.

2016/09

Project: reflink.io

Reflink.io was a SaaS platform dedicated to e-commerce. It makes it possible to run a self-served affiliate network and further helps to build a partner network and track performance and revenues of each partner. The system was built using Laravel and Go.

2014/04 → 2015/11

Adbrowser.net

Adbrowser was a performance Ad server (as SaaS model), responsible for displaying exact targeted ads on partner websites. It can also be managed as an affiliate tracking tool. The system had couple optimisation engines to increase both advertiser and publisher revenue from the ad network. The Project was built to be able to receive high load on servers.

2013/03 → 2014/04

Adview.pro

Adview.pro was a simple display advertising network available mostly for website owners who want to get ads from network and integrate them on their websites. Adview pro is integrated with two payment systems: Paymentwall and Bitcoin. It is built with lightweight reporting systems and a user-friendly and intuitive user panel.